USGS Streamgage 09480000
Santa Cruz River near Lochiel, AZ
Santa Cruz River near Lochiel, AZ is USGS streamgage 09480000 in Arizona, monitoring river discharge in hydrologic subbasin 15050301. It drains a watershed of about 82 square miles. Discharge records at this site go back to 1949. Typical flow runs near 0.2 cfs in July and 0.3 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Arizona
- Drainage area
- 82 sq mi
- Gauge elevation
- 4,633 ft
- Subbasin (HUC-8)
- 15050301
- Coordinates
- 31.35541, -110.58956
- USGS site number
- 09480000
- Records begin
- 1949-01-01 (77 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 78 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 0.1 | 0.6 | 2.9 | |
| February | 0.1 | 0.6 | 2.9 | |
| March | 0.1 | 0.5 | 2.4 | |
| April | 0 | 0.3 | 1.7 | |
| May | 0 | 0.2 | 0.9 | |
| June | 0 | 0 | 0.5 | |
| July | 0 | 0.2 | 11.3 | |
| August | 0 | 0.6 | 22 | |
| September | 0 | 0.6 | 8.6 | |
| October | 0 | 0.4 | 4.2 | |
| November | 0 | 0.5 | 2.1 | |
| December | 0.1 | 0.6 | 1.8 |
All values in cubic feet per second (cfs).
Common questions
- When does Santa Cruz River near Lochiel, AZ normally run highest?
- January, on the long-term record. The median daily flow that month is about 0.6 cfs, against 0 cfs in June, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Santa Cruz River near Lochiel, AZ?
- It depends on the month. In January, half of days historically fall near 0.6 cfs, with the middle 80% of days between 0.1 and 2.9 cfs. The month-by-month table on this page gives the full range.
- How long has Santa Cruz River near Lochiel, AZ been measured?
- Discharge records at USGS site 09480000 begin in 1949, about 77 years, covering roughly 7,392 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Santa Cruz River near Lochiel, AZ?
- The gauge sits at 31.35541, -110.58956, in Arizona, in hydrologic subbasin 15050301, at an elevation of about 4,633 feet, draining roughly 82 square miles.
- Can I use Santa Cruz River near Lochiel, AZ data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.
Other gauges in this subbasin
- Santa Cruz River near Nogales, AZ
- Nogales Wash at Nogales, AZ
- Santa Cruz River at Tubac, AZ
- Santa Cruz River at Continental, AZ
- Santa Cruz River at Silverlake Rd, at Tucson, AZ
- Santa Cruz River at Tucson, AZ
- Rillito Creek at La Cholla Blvd near Tucson, AZ
- Canada del Oro below Ina Road, near Tucson, AZ